mantra vs sacred text

mantra and sacred text both are nouns.

Word	Noun	Adjective	Verb	Adverb
mantra	Yes	No	No	No
sacred text	Yes	No	No	No

As nouns, sacred text is a hypernym of mantra; that is, sacred text is a word with a broader meaning than mantra:

mantra: (Sanskrit) literally a `sacred utterance' in Vedism; one of a collection of orally transmitted poetic hymns
sacred text: writing that is venerated for the worship of a deity

Other hypernyms of mantra include religious text, religious writing, sacred writing.

mantra (noun)	sacred text (noun)
(Sanskrit) literally a `sacred utterance' in Vedism; one of a collection of orally transmitted poetic hymns	writing that is venerated for the worship of a deity
a commonly repeated word or phrase